Characterization of Binary Offset Carrier (BOC) Systems Coexisting With Other Wideband Signals
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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Results for modeling, simulation, and analysis of interference effects that modern interfering signals have on the system performance of the Binary Offset Carrier BOC signals, such as the Global Positioning System GPS Military System M-Code signal are addressed in this work. Three signals are addressed as potential interferers. These include the current GPS clearacquisition code CA-Code signal, the current GPS precision code P-Code signal, and an Orthogonal Frequency Division Multiplexed OFDM signal. All of these potential interferers are modeled as coexisting within the same bandwidth as the M-Code signal. Interference effects are characterized by comparing the bit error performance of a simulated M-Code system independently and then with the coexisting signal present. The results indicate that the GPS CA-Code and P-Code signals can exceed the M-Code received power by over 25 dB before the M-Code system performance is degraded. The OFDM interference results indicate that the M-Code system is more sensitive to coexistence with a signal of this type the M-Code system is significantly degraded with OFDM signals just over 30 dB stronger than the M-Code signal.
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